公开(公告)号：US4359692A

公开(公告)日：1982-11-16

申请号：US204743

申请日：1980-11-07

Applicant: Carl R. Ryan

Inventor： Carl R. Ryan

IPC: H04L27/14 ,  H04L27/152 ,  H04L27/18 ,  H04L27/227 ,  H04L27/233 ,  H04L27/38 ,  H03D3/06 ,  H04L27/22

CPC classification number: H04L27/2332 ,  H04L27/1525

Abstract: A shift keyed phase detector having a first input for receiving a signal including data shift keyed modulated on a carrier, such as BPSK, QPSK, MSK, SMSK, etc., and a second input for receiving a reference frequency from a local oscillator, to supply in-phase and quadrature channel data signals at differing phase error angles relative to the local oscillator reference frequency. The in-phase and quadrature channel signals are squared, and the squared signals are summed and filtered to provide a first phase error signal. The in-phase and quadrature channel signals are also multiplied with each other and filtered to provide a second phase error signal. The in-phase and quadrature channel signals are cross-multiplied with each of the phase error signals and then combined to provide a data signal in phase with the original data signal.

Abstract translation: 一种移位键控相位检测器，具有用于接收包括在诸如BPSK，QPSK，MSK，SMSK等载波上键控调制的数据移位的信号的第一输入端和用于从本地振荡器接收参考频率的第二输入， 提供相对于本地振荡器参考频率的不同相位误差角的同相和正交通道数据信号。 同相和正交信道信号被平方，并且平方信号被相加和滤波以提供第一相位误差信号。 同相和正交通道信号也被彼此相乘并被滤波以提供第二相位误差信号。 同相和正交信道信号与每个相位误差信号交叉乘法，然后组合以提供与原始数据信号同相的数据信号。

公开(公告)号：US4601048A

公开(公告)日：1986-07-15

申请号：US596117

申请日：1984-04-02

Applicant: Carl R. Ryan

Inventor： Carl R. Ryan

IPC: H04L27/20 ,  H04L27/10

CPC classification number: H04L27/2017

Abstract: An apparatus and method is disclosed of an SMSK/N concept that utilizes a divide-by-N device in the modulator and a multiply-by-N device in the demodulator to provide improved bandwidth efficiency over conventional SMSK devices. This apparatus provides reduced bandwidth without an excessive increase in the power required for transmission.

Abstract translation: 公开了一种利用调制器中的N分频器件和解调器中的N乘法器件的SMSK / N概念的装置和方法，以提供超过常规SMSK器件的带宽效率。 该装置提供减少的带宽，而不会过度增加传输所需的功率。

公开(公告)号：US4646005A

公开(公告)日：1987-02-24

申请号：US590097

申请日：1984-03-16

Applicant: Carl R. Ryan

Inventor： Carl R. Ryan

IPC: G01R1/06 ,  G01R13/22 ,  G01R19/28 ,  G01R1/30 ,  G01R31/02

CPC classification number: G01R1/06 ,  G01R13/22 ,  G01R19/28

Abstract: A signal probe that does not require a direct ground contact is disclosed. The probe consists of a resistive measuring tip, an amplifier and a probe body which acts as an antenna providing a ground reference for the probe. The frequency of the signal measured may be compensated for by adjusting the resistive tip in the probe which varies the shunt capacitance between the resistor and the probe body.

Abstract translation: 公开了不需要直接接地的信号探针。 探头由一个电阻测量尖端，一个放大器和一个探头主体组成，它作为提供探头接地参考的天线。 所测量的信号的频率可以通过调整探头中的电阻尖端来进行补偿，该电阻尖端改变电阻器和探针体之间的分流电容。

公开(公告)号：US4547888A

公开(公告)日：1985-10-15

申请号：US402513

申请日：1982-07-28

Applicant: Carl R. Ryan ,  Allan R. Hambley

Inventor： Carl R. Ryan ,  Allan R. Hambley

IPC: H04L27/01 ,  H04B3/18

CPC classification number: H04L27/01

Abstract: SMSK data link degradation in future and immediate past bits produced by carrier phase error and small errors in the sampling instant are reduced by a recursive adaptive equalizer having a feedforward stage with adjustable weight for each future bit to be corrected and a feedback stage with adjustable weight for each immediate past bit to be corrected. The weights are controlled by a controller which samples the output and adjusts each weight until the output is correct.

Abstract translation: 通过载波相位误差产生的SMSK数据链路衰减和采样时刻的小误差，通过递归自适应均衡器减少了具有可校正的每个未来位的可调重量的前馈级和具有可调重量的反馈级 为每一个立即过去的一点修正。 重量由控制器控制，控制器对输出进行采样并调整每个重量，直到输出正确。

公开(公告)号：US5703504A

公开(公告)日：1997-12-30

申请号：US578727

申请日：1995-12-26

Applicant: Christopher K. Y. Chun ,  Stephen G. Shook ,  Carl R. Ryan

Inventor： Christopher K. Y. Chun ,  Stephen G. Shook ,  Carl R. Ryan

IPC: H03F3/08 ,  H03F3/343 ,  H03F3/45 ,  H03G3/34 ,  H03K5/22

CPC classification number: H03F3/08 ,  H03F3/3432 ,  H03F3/45982 ,  H03G3/345

Abstract: A signal processing circuit (10) generates a bias signal (27) that is used for biasing a comparator (26). An input signal (14) is compared to the bias signal (27) in order to reconstruct the input signal (14) on an output of the comparator. The bias signal (27) is generated by selecting the larger of a percent of the input signal (23) or an offset signal (24) that is larger than a minimum value of the input signal.

Abstract translation: 信号处理电路（10）产生用于偏置比较器（26）的偏置信号（27）。 将输入信号（14）与偏置信号（27）进行比较，以便重建比较器的输出端上的输入信号（14）。 偏置信号（27）通过选择输入信号（23）的百分比中的较大者或大于输入信号的最小值的偏移信号（24）来产生。

公开(公告)号：US4092606A

公开(公告)日：1978-05-30

申请号：US808510

申请日：1977-06-21

Applicant: Alan M. Acting Administrator of the National Aeronautics and Space Administration, with respect to an invention of Lovelace ,  Carl R. Ryan

Inventor： Alan M. Acting Administrator of the National Aeronautics and Space Administration, with respect to an invention of Lovelace ,  Carl R. Ryan

IPC: H04L27/00 ,  H04L27/227 ,  H03D3/00

CPC classification number: H04L27/2273 ,  H04L2027/0051 ,  H04L2027/0067 ,  Y10S331/02

Abstract: A received, suppressed carrier, quadraphase shift key modulated (QPSK) signal is demodulated with a phase locked loop including a variable frequency, coherent reference that drives first and second channels also responsive to the QPSK signal. The channels respectively derive first and second replicas of binary signals that modulated the suppressed carrier. The replicas are combined to derive a variable amplitude error signal for controlling the coherent reference frequency. The frequency of the coherent reference is dithered at a low rate so that there is derived a relatively low level tracking error phase from the locked loop. The frequency of the coherent reference is swept when the phase of the error signal differs from the dithering phase by a predetermined value that is appreciably less than 90.degree..

公开(公告)号：US4053837A

公开(公告)日：1977-10-11

申请号：US745264

申请日：1976-11-26

Applicant: Carl R. Ryan ,  James H. Stilwell

Inventor： Carl R. Ryan ,  James H. Stilwell

IPC: H04L27/01 ,  H03H7/36

CPC classification number: H04L27/01

Abstract: A quadriphase shift keyed (QPSK) adaptive equalizer includes baseband inphase (I) and quadrature (Q) adaptive filters for receiving demodulated OPSK signals. The I and Q channel filters are designed to operate independent of each other and adapt their characteristics continuously in a predetermined manner in response to an incoming received QPSK signal, distorted in an unknown time varying manner.

Abstract translation: 四相移键控（QPSK）自适应均衡器包括用于接收解调的OPSK信号的基带同相（I）和正交（Q）自适应滤波器。 I和Q通道滤波器被设计成彼此独立地操作并响应于以未知的时变方式失真的输入的接收的QPSK信号以预定的方式连续地适应它们的特性。

公开(公告)号：US4816775A

公开(公告)日：1989-03-28

申请号：US106073

申请日：1987-10-08

Applicant: Carl R. Ryan

Inventor： Carl R. Ryan

IPC: H03L7/081 ,  H03L7/087 ,  H03L7/10

CPC classification number: H03L7/081 ,  H03L7/087

Abstract: A phase acquisition and tracking apparatus in which a phase difference between a reference signal and a signal to be acquired is rotated within a negative feedback loop so that such phase difference disappears is disclosed. In another embodiment, a baseband signal which is influenced by such a phase difference is rotated within a negative feedback loop so that the phase difference disappears. The phase rotated signal serves as an output signal from the phase acquisition and tracking apparatus, and this output signal faithfully and rapidly reproduces the input signal regardless of any particular value of such phase difference. Since a negative feedback loop is used to control the amount of phase rotation, non-linearities and other errors produced by multipliers, summing devices and combining circuits are automatically compensated for through the feedback.

Abstract translation: 一种相位采集和跟踪装置，其中参考信号和要获取的信号之间的相位差在负反馈环路内旋转，从而公开了这种相位差消失。 在另一个实施例中，受这种相位差影响的基带信号在负反馈环路内旋转，使得相位差消失。 相位旋转信号用作来自相位采集和跟踪装置的输出信号，并且该输出信号忠实且快速地再现输入信号，而不管这种相位差的任何特定值。 由于使用负反馈环路来控制相位旋转量，所以通过反馈自动补偿由乘法器，求和装置和组合电路产生的非线性和其他误差。

公开(公告)号：US4656646A

公开(公告)日：1987-04-07

申请号：US846497

申请日：1986-03-27

Applicant: Carl R. Ryan

Inventor： Carl R. Ryan

IPC: H04L27/20 ,  H04L27/10

CPC classification number: H04L27/201

Abstract: An apparatus and method is disclosed of an SMSK/2 device that provides an additional phase state, and having at least three phase changes possible per bit period, as compared with standard SMSK/2 devices. The additional phase state increases the bit time needed for the signals to remerge which increases the euclidean distance defined by the remergence paths. The increase in euclidean distance provides an improved power efficiency and bit error rate (BER).

Abstract translation: 公开了一种提供附加相位状态并且与标准SMSK / 2设备相比具有每位周期可能的至少三个相位改变的SMSK / 2设备的装置和方法。 附加相位状态增加信号重新聚合所需的位时间，这增加了由重合路径定义的欧几里德距离。 欧几里德距离的增加提高了功率效率和误码率（BER）。

公开(公告)号：US4445094A

公开(公告)日：1984-04-24

申请号：US268412

申请日：1981-05-29

Applicant: Carl R. Ryan

Inventor： Carl R. Ryan

IPC: H04L27/00 ,  H04L27/18 ,  H04L27/227 ,  H04L27/14

CPC classification number: H04L27/2273 ,  H04L2027/0057 ,  H04L2027/0067

Abstract: An SMSK or MSK demodulator utilizing a Costas type closed loop wherein the voltage controlled oscillator is offset from the apparent carrier frequency of the SMSK or MSK signals so that the in-phase arm of the loop provides data at the output and the quadrature arm of the loop provides an indication that the loop is locked and, in combination with the data output, provides a control signal for the VCO which maintains the loop locked.

Abstract translation: 使用科斯塔斯型闭环的SMSK或MSK解调器，其中压控振荡器偏离SMSK或MSK信号的表观载波频率，使得环路的同相臂在输出端和正交臂处提供数据 环路提供了环路锁定的指示，并且与数据输出相结合，为VCO提供控制信号，该控制信号保持环路锁定。